I have an 2005.5 S4 cabriolet with 6-speed Tiptronic transmission. The car was delivered with the 4-spoke multi-function steering wheel as an "upgrade". I have limited use for the radio controls and would prefer to change it back to the 3-spoke "standard equipment" steering wheel with paddle shifters for the tiptronic. Two local dealers don't have a clue if this is even possible. Anybody have any facts on this one?